1) We use ... to talk about permanent truths, such as scientific facts, and general habits. a) the zero conditional b) the first conditional 2) In ... sentences, the structure is: if/when + present simple >> present simple. a) zero conditional b) first conditional 3) We use ... when we talk about future situations we believe are real or possible. a) the zero conditional b) the first conditional 4) If you’re free later, we can go for a walk. a) the zero conditional b) the first conditional 5) If it doesn’t rain for a long time, the earth gets very dry. a) the zero conditional b) the first conditional 6) He’ll call if he needs help. a) the zero conditional b) the first conditional 7) I’ll carry on doing this work unless my boss tells me to do something else. a) the zero conditional b) the first conditional 8) Another way to make first conditional sentences is to use ‘... ’ which means ‘only if’, ‘if … not’, or ‘except if’. a) as long as b) unless c) until 9) In ... sentences, the structure is usually: if/when + present simple >> will/can + infinitive or the imperative form a) zero conditional b) first conditional 10) I'll give you a key in case I'm not at home. a) the zero conditional b) the first conditional 11) Use ... after when, until, unless, and if to talk about future. a) the future tense b) the present tense 12) You can go to the party, if you're back by midnight. a) the zero conditional b) the first conditional 13) If you sit in the sun, you'll get a suntan. a) the zero conditional b) the first conditional 14) If you sit in the sun, you get a suntan. a) the zero conditional b) the first conditional

Zero & First Conditionals (rule)

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